If worse comes to worse seeing your replacing bearings do you have a cut off tool! The new ones will tap right on after you clean up shaft as maim said.
You won't have to take them to a shop. They slide right on with a little tapping. I set bearing on top of vice supported on top of jaws just wide enough for race then just tap shaft onto bearing with a rubber mallet.
Okay, got some bad bearings on set of my suspension wheels but I can't for the life of me figure out how to get the wheels off! Here's a pic.
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And they sit here (not my sled, but a good example)
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